Something does not sound right - we are not experiencing this in our 2013. If anything, I've noticed our 2013 Ody directs MORE air to the floor vents when in heating mode than our previous 2004 did. Not that the 2004 had poor heating characteristics, but that van sent more air to the two side dash vents (near the driver and front passenger doors) than our 2013 does. I had gotten into the habit of closing those two dash vents 50% when in heating mode to direct more air to the floor. In the 2013, even with those side dash vents wide open, I can barely feel any air from them.
Not to state the obvious, but make sure you have the directional setting to the floor only, and more importantly do not manually increase the fan speed, let the climate control do that. The only reason I say that is my wife recently had a similar complaint about poor heating. On the next drive I noticed the vent setting was on floor/windshield, and the fan speed was manually turned up. The system was essentially delivering more (cooler) air than warmest possible air, and it was split between floor and windshield. Once the system was set to floor, and desired warm temperature, the heating performance (and perception of warmth) was restored.